Form work for concrete construction.



R. ANDERSON, FORM WORK FOR GONGRETE CONSTRUCTION.

APPLICATION FILED DBO. 27, 1910. Y

' Patented Jan. 16, 1912.

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I R. ANDERSON.

IORM WORK FOR CONCRETE CONSTRUCTIQN.

APPLICATION IILBD DEC. 27, 1910.

Patented Jan. 16, 1912.

4 SHEETS-SHEET 2.

R. ANDERSON. I FORM WORK FOR CONCRETE CONSTRUCTION.

' APPLICATION I' ILED DEC. 27, 1910. I

Patented Jan. 16, 1912.

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R. ANDERSONV FORM WOB.K FOB. CONCRETE CONSTRUCTION.

' APPLICATION FILED DEC. 27, 1910. 1 014,738. Patented Jan. 16,1912.

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UNITED STATES PATENT, OFFICE.

ROBEBT A NDERS ON, O1? CINCINNATI, OHIO.

FORM WORK FOR CONCRETE CONSTRUCTION.

Specification of Letters Patent.

Patented Jan. 16,1912.

Application filed December 27, 1910. Serial No. 598,594.

' a citizen of the United-States ofAmerica,

and resident of Cincinnati, county of Hamilton, and State of Ohio, have invented certain new and useful Improvements in Form Work for Concrete Construction, of which the following is a specification. This invention relates to molds or forms employed in concrete construction.

The forms employed in concrete construction are assembled into a structure, which may be termed the form work and this.

structure or form work must be sufliciently strong and rigid to support the concrete and the reinforcing members for the concrete, prior to the time that the concrete is capable of supporting itself, 'or, in other words, prior to the tlme that the concrete sets to form a monolithic structure. The usual meansemployed in building the forms and in assembling them to form the formwork, prevents the form work from being wrecked, or dismantled, without damaging the individual forms of which it is composed and leaving them in a condition-unfit for use again. All prior form work known to me is so badly damaged during the process of ve'recting' or dismantling it, that much of the lumber is left in a condition, which prevents its further use for form work, and that the individual forms 'must employed again.

be practically rebuilt before they can be An object of my invention is to produce aform work consisting of separate forms or molds, assembledlprior to erection and provided with means which readily co-act with other forms, to make an ordinary temporary structure for receiving and supporting the reinforcing members and the concrete, and

I in which said co-actin'g means may be readily disengaged to dismantle the temporary structure, without in any way dama 'ng or detrimentally afiecting the separate molds or forms, so that these forms may be was sembled without reconstructing the individual molds or forms, to form the temporary structure for another building. These and ,other' objectsfI' attain by means of form work embodying the features herein de-.l

tive view of form work embodying my 1nvention, and shows the arrangement of the column, girder, beam. column cap and floor panel forms. The view is taken from. below the girder, beam and floor panel forms. Fig. 2 is a perspective view of the form work illustrated in Fig. 1, and is taken above the girder, beam and floor panel forms. Fig. 3 is a plan view of a column cap form, in 'connection with fragmental views of girder and beam forms, and illustrates a form of connection between the column, girder and beam 'forms, which may be employed with my invention. Fig. 4 is a perspective view of the top portion of a column form, in connection with fragmental views of a girder and a beam form, and illustrates the manner in which the ends of the girder and beam forms are supported in the organized form work illustrated as ail-embodiment of my inven: tion. Fig. 5 is a fragmental perspective view and illustrates a connection between beam and girder forms, which may be employed with the illustrated embodimentof my invention. Fig. 6 is a plan view of girders, beams, and their connections.

In-the form work illustrated as an embodime'nt of my invention, I have employed disintegrable column forms 6, which are formed of separate panels, capable of being temporarily secured together for the purpose of forming a column mold, and also capable of being taken apart and removed from the column, after itis formed. column form of this general description may be employed in connection with my invention. Each column form illustrated, is prog'ided with a supporting shelf 7, which .is l

Any 5 ca'ted at the upper end of the form, flush. 4

with the tops'of the form boards or panels, and which is adapted to support a column cap form 8, and the ends of girder and beam forms 9 and 10. The shelf-7 of each of thecoltzmn forms 6 illustrated, is em-, ployed with other; devices in securing the separate panels comprising thecolumn form in place, but such a construction is not es-.

iou

' sential to the purposes of my invention. In

the column forms.

erecting the form work, I preferably, but

1 not necessarily,'form concrete centering lugs 19 on the foundation of the concrete structure, which are of the shape of the concrete columns .,a.nd eventually form 'a portion of the concrete columns of the structure. I then assemble the column forms around these centering lugs and support each column form on elevating or height adjusting wedges 11, which are located adjacent .to the centeringlugs and under the lower edges of Thecolumn forms can be brought to plumb and raised to the desired position by shifting the positions of the wedges, relative to the supported edges' of the column forms. The girder forms 9 are located in place on the column forms by supporting their ends on the shelves 7 of adjacent columns. I have adopted the term girder for a beam which supports the ends of transversely extending beams, and

for convenience of description, I will term the form for such beams girder forms. The ends of the beam forms 10, which ex-' tend between adjacent column forms are also located on the shelves 7. After the girder and beam forms 9 and 10 are in place is erected, the reinforcing members for the concrete structure are located within and upon it and the forms are then filled with concrete.

The individual members'or forms comrised in the form work are all so constructed, that the form work can be dismantled and removed from the concrete structure, withoutin anyway damaging the forms.

In the operation of dismantling the form work, the first step .is the removal of the column forms from the completed concrete columns. This is accomplished by remov ing the supporting or adjusting wedges 11 and releasing the panels which 'form the molds, so that the panels can be separately removed from the column. With the construction illustrated, there is nothing to prevent the removal of the column forms after the wedges '11 are removed, since the girder,

' cap forms, so that when the column form .is lowered, the shelves separate from the girder beam and cap forms. It will be ap- 7 parent to those skilled in the art that auxiliary shores may be employed for the. purpose of supporting and holding the girder, j

beam and floor panel forms inplace. .These shores have been omitted from the drawings forthe sake of clearness.

After the column forms are removed, the next step is the removal of the beam forms 10-and 12. These forms are so arranged that they may be drop ed down away from the concrete beams w ich they inclose. I

accomplish this by providing inclined ends i on each beam form, so that the forms are longer at the bottom than at the top, and by providing correspondingly'inclined battens on the adjacent forms, against which the inclined ends of the beam forms abut.

For example, the beam forms 10 are provided with a head which projects from the surface of the timber, when the nail is driven home, sothat it is easily accessible for the purpose of withdrawing the nail. After the column forms 6 are removed and the doubleheaded nails 15 are withdrawn from the battens 14, and the supportingshores for the beam forms 10 are removed, there is nothing to hold the beam forms in place, or to prevent thcm from slipping downwardly away from the completed concrete beam. With the'inclined .end construction of the beam forms, the' ferms are incapable of being jammed in place, so that they cannot be easily removed. The slightest downward movement of the beam forms will free the battens'13 from the battens 14 and absolutely release the beam.

The beam forms 12'are similar in construction to the beam forms 10, andtheir endsare supported on removable blocks 1.6, secured to the girder forms 9 by means of double headed nails. The girder forms, 9

are each provided with openings 17 which are located at the points of connection between the girder and beam forms, and the removable blocks 16 are so located on the girder forms, that the ends of the beam forms will register with the openings 17, when the beam forms are in place on them. At one end of the beam, the connection employed between girder and beam forms, consists of vertical battens 18, with inclined faces, on each side of the openings 17. The inclined faces of the battens 18 correspond in i inclination to the ends of the beam forms 12,

and the battens 13 ofthe beam form abutv against the inclined faces and are secured to the. battens 18 by means of removable or double-headed nails. This form of connection cannot be conveniently employed at the other end of'the' beam forms 12, for the .consists in replacing one of the battens 18 .by a key 20 and a supporting bat-ten 21.

The key 20 is provided with an inclined face 22, which corresponds in inclination to the inclination of the ends of tliebeam' forms, and an inclined face 23, which is located against a correspondingly inclined face of the batten 21. The batten 21 is permanently secured to the girder .form, but the key 20 is adapted to be located in place, after the beam form 12 is mounted on its supporting block 16. The key is of such shape, that it will cooperate with the beam and girder forms to complete the connection between them and in effect to form a portion of the beam form. In addition to this, the face 23.

of the key 20 is so inclined that the key is narrower at its inner than its outer edge.

and forms a wedge, which is located between the batten 21 and the finished concrete beam, and which may be easily removed in the operation of dismantling the form work, as will hereinafter be described. The key 20 may be secured temporarily to the batten 21 by means of double-headed or removable nails.

In girder forms where there are more than one beam opening, alternate openings in the girder form are made wider for the 'reception of keys 20, and are arranged so that each beam shall have a key at one of its ends, illustrated in Fig. 6. The" purpose of this is two-fold; first, it provides that the girder form be! when two molded beams shall be of less length than the distance between the adjacent faces of the beams, so that the girder form may readily be lowered away from the molded beam, and, second, it enables an operator to rest a beam form upon one girder form and to swing it into place,

past the key opening, in the other girder form, so as to rest upon the supporting block 16 of the other girder form, after which the beam form may be easily pushed to place and the key 20 be inserted to lock it there, as is illustrated in Fig. 6.

The beam forms 12 are removed from the finished beams by withdrawing the doubleheaded nails and thereby removing the blocks 16. The same conditions exist with reference to these beam forms as has been described in connection with the beam forms 10, and there is no possibility of the ends of the beam, forms binding or becoming jammed, so that the forms cannot beremoved.

Removable joists 24 are mounted on the 'beams 10 and 12, for the purpose of supporting floor panel forms 25, which form a part of the form work. The floor panels are supported at their edges by the column caps, beams and girders, so that they are not removed with the beam forms 10 and 12 and the joists 24. e

The girder forms 9, as has been stated, are

- supported at their ends on the shelves 7 of the column forms, and, in the illustrated embodiment of my invention, I have found it convenient to provide straight or vertical ends for these molds. As illustrated, each end is provided with vertical battens 26, which are adaptedto abut against and engage vertical battens 27, provided on the column caps 8. If desired, the battens 26 and 27 may be secured together by means of removable or double-headed nails, as before described. When the girder forms 9 are designed to support more than one set of beam forms, as illustrated in Figs. 1 and 2, it is.

necessary to provide means i for releasing the form,,so that it may be taken down intact, from the concrete structure. It is impossible to remove a form Without damaging it where the wood of the form is located between and is in contact with concrete members of, the finished structure. For this reason the keys 20 are provided, so that the separate parts of the girder form 9, located between parallel concrete beams,may be eas ily removed, without in any way damaging the girder form. In addition to this, each column cap 8 is beveled at 28, asshown in Fig. 3, so that it forms in effect awedge,

which is located between the vertical end of the girder form and the concrete column cap. The keys 20 are so located in the form work,

that each portion of a' girder form located.

between two parallel beams, will be provided with one set of keys.

After the beam forms 12 have been removed from' the girder forms, the next step is to remove the column cap forms 8, the girder forms and the floor panel forms 25. This is accomplished by removing the keys 20 from between the concrete beams and the battens 21 of the girder forms, and by also removing the column cap forms and in this manner freeing the girder forms. It will be remembered that the column ca forms were supported by the shelves 7 o the column' forms only and that therefore'they may be removed from around thefinished column I wedged in, place between the form work and the nished structure. After the form work is dismantled and removed,'the blocks 16 may be again secured to the girder forms and the form work may be again assembled,

as has been described, for the purpose of constructing another portion of the concrete structure, or for the purpose of constructing another concrete structure.

What I claim is 1. A form-workfor molding concrete buildings, consisting of a column form with an independent shelf flush with its upper edge, beam forms resting upon the shelf, and removable cap forms joining the ends of the beam forms and constituting a part of the molding device, whereby when the column form is removed, the shelf is lowered therewith from beneath the beam and cap forms; H

2; A-concrete building form-work consisting of column forms, girder and beam forms, the column forms having independent shelves at their upper ends, the girder forms I and beam forms resting upon theshelves,

and removable cap forms between the ends of the girder and beam forms resting upon the shelves and filling the space between-the girder and beam forms.

3. A concrete building form-work consisting of column forms, girders, beam and column cap forms, the column forms having independent shelves at their upper ends, the girder,.beam and column cap forms resting upon the shelves, the cap forms'filling in the space between the girder and beam forms and curing them temporarily together.

4. A'concrete building form-work consisting of column forms, girder and beam forms resting upon the column forms, removable connections which secure the girder and the beam forms upon the top of the column forms, and means restingon the floor for engagin the sides of and supporting the column orms temporarily above their supporting floor.

P 5. In a form work for concrete structures, disintegrable .column forms, removable wedgesfor supporting said forms, column gapsforms supported on said column forms, and beam forms supported on sald sie em n forms and located between column cap forms, beam forms supported between the girder forms, and downwardly-detachable connections between said column cap and girder forms and said beam forms.

6. In a form work; forconcrete structures, separately formed P disintegrable column forms, removable wedges for supporting said forms, form supporting shelves on said column forms, beam and cap forms located upon the shelves and comprising beam forms provided with inclined ends supported by said shelves, and column cap forms located on said shelves and provided with inclined members cooperating with the inclined ends of said beam forms.

7. In a form work for concrete structures, separately formed disintegrable column forms, a form supporting shelf mounted on each column form, beam and cap forms 10- 'cated upon theushelves and comprising beam' forms provided with inclined ends supported on said shelves, column cap forms supported on said shelves andprovided' with inclined members cooperating with the inclined ends of said beam forms, and girder forms sup ported on said shelves.

8. In a form work for concrete structures, a separately formed disintegrable column form, a shelf mounted on said column form, girder forms supported by said shelf, beam forms provided with inclined ends supported by said shelf, and a column cap form located on said shelf cooperating with said girder forms and provided ,with inclinedmembers which cooperate with the inclined ends of said beam forms.

9. In a form work for concrete structures,v a separately formed disintegrable column form, removable wedges supporting said form, a shelf located on said form, beam forms provided with inclined ends supported by said shelf, girderforms supported by said shelf, a column cap form located on said shelf and cooperating with said girder forms and provided with inclined members, which cooperate with the inclined ends of said beam forms, beam forms located between said girder forms, and blocks removably mounted on said girder forms for holding said last melltioned'beam forms in place.

f 10. In a form work for concrete structures, a girder form,.a beam form provided with inclined ends, a removable" block mounted on said girder form. for supporting one end of said beam form, and a double-tapered removable key between one end of said beam and said girder form.

11. In' a form work for concrete strucprovided with inclined faces mounted on the clined faces permanently mounted on said girder ,forms and cooperating with the inclined ends of said beam forms, and doubletapered removable keys located between one end of each beam form and a girder form.

ROBERT ANDERSON.

girder forms for cooperating with the inclined ends of said beam forms.

12. In a form work for concrete structures, girder forms, beam forms located between said girder forms and provided with inclined ends, removable blocks mounted on thegirder fdrms for supporting the-ends of the'beam form's,-'battens provided with in- Witne'sses: I

WALTER F, MURRAY, E. W. MCGALLIsTER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner or Patents,

1 Washington, D. C. 

